Oswald in the doorway: the blog of the Oswald Innocence Campaign, by Ralph Cinque

 Something happened on Elm Street that caused JFK to completely disconnect from reality; to lose his mind; and it is the biggest revelation of the Zapruder film. Consider that JFK never spoke; he never tried to speak; he never gestured; he never tried to communicate in any way; he never responded to his wife's ministrations; he never showed any cognizance or understanding of the situation; and he never took any action in response to it. There is no way anyone could have been more divorced from reality than he was.  There isn't one thing that anyone can point to as a sign of awareness on JFK's part.  He suffered a total mental collapse. 

Yet, the wound in his back was no more than deep scratch. The extent to which he was physically impaired from it was zero. It was truly nothing. 

So, what about the throat wound? It damaged his trachea but only on the left side. That shot, whatever it was, briefly caused a respiratory obstruction. But, he cleared it promptly by coughing, and after that, his breathing was fine. That shot hit him so low in the neck that any lower, it would have hit his chest. There is no way it could have done any damage to his brain.  

But, James Fetzer claims that Dr. Bob Livingston said that the throat shot somehow caused brain damage, But that's not what Livingston said. Here he is talking about the throat wound. And did you know that he called Dr. James Humes on the night of the assassination, before the autopsy began, to inform him about the throat wound?  And he reached him. Livingston and was able to talk to him. He told Humes that the Parkland doctors had discovered an entrance wound in JFK's neck, and that he needed to explore its track and try to find any bullet or fragments of bullet that remained. Livingston emphasized that it had to be a frontal wound because there was no tearing of the tissues. He said that Humes listened to him respectfully and was cordial, but he ended the conversation abruptly. Here is Livingston:

https://www.youtube.com/watch?v=ma8aqkr-0Tg

Surely at that time, Livingston had no thought that the throat shot affected JFK's brain. There was no reason for him to think that, and there is no reason for anyone to think that today. 

So, what could have caused JFK's complete mental collapse? Poisoning. There is nothing else. He was hit with an ice dart that burst upon entering, and it delivered a nerve agent and perhaps other drugs. Stop thinking that this is farfetched. It is the only possibility.